Testosterone. An important hormone.
D000375:Aging / Q000502:physiology; D020249:Hormone Replacement Therapy / Q000009:adverse effects / Q000379:methods; D006801:Humans; D007006:Hypogonadism / Q000150:complications; D008297:Male; D013739:Testosterone / Q000172:deficiency* / Q000502:physiology
D013739:Testosterone